Damping-adjustable single-cylinder shock absorber with nitrogen tank

Abstract

The utility model relates to the technical field of shock absorbers, and discloses a damping-adjustable single-cylinder shock absorber with a nitrogen tank, which comprises a shock absorber main body and the nitrogen tank, the nitrogen tank is connected with the shock absorber main body through a high-pressure oil way, and an adjustable assembly is arranged on one side in the nitrogen tank. The adjustable assembly comprises an adjusting valve base installed on one side of the interior of the nitrogen tank and an adjusting valve element rotationally installed on one side of the adjusting valve base, a plurality of oil drainage grooves of different sizes are formed in the outer side of the adjusting valve element, and the high-pressure oil way is communicated with the interior of the nitrogen tank through the oil drainage grooves. On the basis of the design of a conventional single-cylinder shock absorber, the oil drainage grooves with different flow areas are additionally arranged, and when the shock absorber is compressed, the passage flow during compression can be controlled through the oil drainage grooves to adjust the damping force value during compression, so that the device can control the oil flow, the damping force value of the shock absorber is more controllable, and the service life of the shock absorber is prolonged. And more use scenes can be satisfied.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a damping-adjustable monotube shock absorber with a nitrogen tank. Background Art

[0002] During driving, shock absorbers are typically installed on the vehicle's suspension system to rapidly dampen vibrations between the frame and body, improving the smoothness and comfort of the ride. During daily driving, appropriate shock absorbers should be used based on the road conditions. This not only significantly improves driving comfort but also effectively extends the lifespan of the shock absorbers. In harsh conditions or where high shock absorber requirements are required, aluminum monotube shock absorbers are typically used with a nitrogen tank. High-pressure nitrogen is filled into the tank's air chamber and stored there. A free piston separates the oil and gas, offering advantages such as fast response, simple construction, easy heat dissipation, and convenient maintenance. However, this structure also has certain limitations. The valve system's damping force is single, making it difficult to adapt to varying road conditions, significantly impacting ride comfort. Utility Model Content

[0003] The purpose of the utility model is to solve the problems existing in the prior art and to propose a single-tube shock absorber with adjustable damping and a nitrogen tank.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A monotube shock absorber with adjustable damping and a nitrogen tank comprises a shock absorber body and a nitrogen tank, the nitrogen tank being connected to the shock absorber body via a high-pressure oil circuit. An adjustable assembly is provided on one side of the interior of the nitrogen tank. The adjustable assembly comprises a regulating valve base mounted on one side of the interior of the nitrogen tank, a regulating valve core rotatably mounted on one side of the regulating valve base, and a compression valve assembly fixedly mounted on the inner side of the regulating valve base. A plurality of oil drain grooves of different sizes are provided on the outer side of the regulating valve core. The high-pressure oil circuit is connected to the interior of the nitrogen tank in sequence through the gap between the regulating valve base and the compression valve assembly and the oil drain grooves.

[0006] Preferably, the shock absorber body includes a cylinder and a guide arranged on one side of the cylinder. A matching piston is movably arranged inside the cylinder, and a piston rod is installed on one side of the piston. The other end of the piston rod is movably passed through the guide and the cylinder to the outside of the cylinder, and a lifting ring is installed at this end. A second oil chamber is also provided inside the cylinder. The second oil chamber is located on the other side of the piston and is connected to the inner cavity of the cylinder and the high-pressure oil pipe.

[0007] Preferably, shock-absorbing blocks are installed at both ends of the oil cylinder.

[0008] Preferably, a matching floating piston is provided inside the nitrogen tank, and a valve is provided on the side of the nitrogen tank away from the high-pressure oil circuit.

[0009] Preferably, the regulating valve base is connected to the inner wall of the nitrogen tank via an O-ring, and the O-ring is made of rubber.

[0010] Preferably, the oil drain groove is opened on the outside of the adjustable valve core and extends to the bottom thereof.

[0011] Preferably, a knob is installed on one side of the adjustable valve core, and the knob is located on a side of the nitrogen tank away from the valve.

[0012] Compared with the prior art, the beneficial effects of the present invention are:

[0013] The utility model adds oil drain grooves with different flow areas to the basic design of conventional single-tube shock absorbers. When the shock absorber is compressed, the flow rate of the passage during compression can be controlled through the oil drain groove to adjust the damping force value during compression, thereby enabling the device to control the oil flow rate and make the damping force value of the shock absorber more controllable, meeting more usage scenarios. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a front view of a monotube shock absorber with adjustable damping and a nitrogen tank proposed in the utility model;

[0015] Figure 2 This is a schematic diagram of the state change of a monotube shock absorber with adjustable damping and a nitrogen tank proposed in the utility model;

[0016] Figure 3 The utility model proposes a single-tube shock absorber with adjustable damping of nitrogen tank Figure 1 A magnified schematic diagram;

[0017] Figure 4 This is a schematic diagram of the oil drain groove of the adjustable valve core of a monotube shock absorber with adjustable nitrogen tank damping proposed by the utility model.

[0018] In the figure: 1. Shock absorber body; 2. Nitrogen tank; 3. Regulating valve base; 4. Regulating valve core; 5. Oil drain groove; 6. High-pressure oil circuit; 7. Cylinder; 8. Guide; 9. Piston; 10. Piston rod; 11. Lifting ring; 12. Second oil chamber; 13. Shock absorber block; 14. Floating piston; 15. Valve; 16. O-ring; 17. Knob; 18. Compression valve assembly. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0020] Reference Figures 1 to 4 A single-tube shock absorber with adjustable damping and a nitrogen tank comprises a shock absorber body 1 and a nitrogen tank 2, wherein the nitrogen tank 2 is connected to the shock absorber body 1 through a high-pressure oil circuit 6, and an adjustable assembly is provided on one side of the interior of the nitrogen tank 2. The adjustable assembly comprises a regulating valve base 3 installed on one side of the interior of the nitrogen tank 2, a regulating valve core 4 rotatably installed on one side of the regulating valve base 3 through a bearing, and a compression valve assembly fixedly installed on the inner side of the regulating valve base 3. A plurality of oil drain grooves 5 of different sizes are provided on the outside of the regulating valve core 4, and the high-pressure oil circuit 6 is connected to the interior of the nitrogen tank 2 through the gap between the regulating valve base 3 and the compression valve assembly and the oil drain groove 5 in turn.

[0021] This shock absorber is based on the design of a conventional monotube shock absorber, and has an additional oil drain groove 5 with different flow areas. When the shock absorber is compressed, the position of the oil drain groove 5 can be adjusted by rotating the regulating valve core 4, thereby controlling the flow rate of the passage during compression and adjusting the damping force value during compression. This allows the device to control the oil flow rate, making the damping force value of the shock absorber more controllable and meeting more usage scenarios. The specific principle is as follows:

[0022] After being installed on the vehicle, the shock absorber will repeat the process from the piston rod 10 being stretched to the shortest when it is compressed. Figure 2 As shown:

[0023] During the downward pressing process of the piston rod 10, the oil flows through the hole of the oil cylinder 7 → the high-pressure oil pipe → the gap between the regulating valve base 3 and the compression valve assembly → the oil drain tank 5 → and enters the nitrogen tank 2. Figure 3 As shown, at this time, when the adjusting knob 17 is rotated, the flow area in the corresponding oil drain groove 5 changes, and the corresponding compression / restoring force value also changes accordingly.

[0024] In this embodiment, the shock absorber body 1 includes a cylinder 7 and a guide 8 arranged on one side of the cylinder 7. A matching piston 9 is movably provided inside the cylinder 7, and a piston rod 10 is installed on one side of the piston 9. The other end of the piston rod 10 is movable through the guide 8 and the cylinder 7 to the outside of the cylinder 7, and a lifting ring 11 is installed at this end. A second oil chamber 12 is also provided inside the cylinder 7. The second oil chamber 12 is located on the other side of the piston 9 and is connected to the inner cavity of the cylinder 7 and the high-pressure oil pipe. The lifting ring 11 is used for loading connection, and the piston rod 10 drives the oil in and out through the piston 9 when it moves inside the cylinder 7 under the action of the guide 8.

[0025] In this embodiment, shock-absorbing blocks 13 are installed at both ends of the oil cylinder 7 .

[0026] In this embodiment, a matching floating piston 14 is provided inside the nitrogen tank 2. A valve 15 is provided on the side of the nitrogen tank 2 away from the high-pressure oil circuit 6. The valve 15 is used to replenish nitrogen. A solenoid valve or a one-way valve can be selected. After the oil enters the nitrogen tank 2, it forms a thrust on the floating piston 14, and the nitrogen on the other side of the piston 9 is squeezed to form a shock absorber.

[0027] In this embodiment, the regulating valve base 3 is connected to the inner wall of the nitrogen tank 2 via an O-ring 16 , and the O-ring 16 is made of rubber to provide sealing and prevent oil leakage.

[0028] In this embodiment, the oil drain groove 5 is opened on the outside of the adjustable valve core and extends to the bottom thereof. Figure 4 For reference, when the adjustable valve core is installed in the nitrogen tank 2, its bottom position is toward the left side of the nitrogen tank 2, and the oil enters the bottom of the oil drain groove 5 first, and then enters the nitrogen tank 2 from the side of the oil drain groove 5. Due to the different sizes of the oil drain groove 5, the flow rate that can pass through is different, which can be used to adjust the damping force value during compression.

[0029] In this embodiment, a knob 17 is installed on one side of the adjustable valve core, and the knob 17 is located on the side of the nitrogen tank 2 away from the valve 15. The knob 17 is convenient for rotating the adjustable valve core.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A monotube shock absorber with adjustable damping and a nitrogen tank, comprising a shock absorber body and a nitrogen tank, wherein the nitrogen tank is connected to the shock absorber body via a high-pressure oil line, and is characterized in that: An adjustable assembly is provided on one side of the interior of the nitrogen tank. The adjustable assembly includes a regulating valve base installed on one side of the interior of the nitrogen tank, a regulating valve core rotatably installed on one side of the regulating valve base, and a compression valve assembly fixedly installed on the inner side of the regulating valve base. A plurality of oil drain grooves of different sizes are provided on the outer side of the regulating valve core. The high-pressure oil circuit is connected to the interior of the nitrogen tank in sequence through the gap between the regulating valve base and the compression valve assembly and the oil drain groove.

2. The monotube shock absorber with adjustable damping and nitrogen tank according to claim 1, characterized in that: The shock absorber body includes a cylinder and a guide arranged on one side of the cylinder. A matching piston is movably arranged inside the cylinder, and a piston rod is installed on one side of the piston. The other end of the piston rod is movably passed through the guide and the cylinder to the outside of the cylinder, and a lifting ring is installed at this end. A second oil chamber is also provided inside the cylinder. The second oil chamber is located on the other side of the piston and is connected to the inner cavity of the cylinder and the high-pressure oil pipe.

3. The monotube shock absorber with adjustable damping and nitrogen tank according to claim 2, characterized in that: Shock-absorbing blocks are installed at both ends of the oil cylinder.

4. The monotube shock absorber with adjustable damping and nitrogen tank according to claim 2, characterized in that: A matching floating piston is provided inside the nitrogen tank, and a valve is provided on the side of the nitrogen tank away from the high-pressure oil circuit.

5. The monotube shock absorber with adjustable damping and nitrogen tank according to claim 1, characterized in that: The regulating valve base is connected to the inner wall of the nitrogen tank via an O-type sealing ring, and the material of the O-type sealing ring is rubber.

6. The monotube shock absorber with adjustable damping and nitrogen tank according to claim 4, characterized in that: The oil drain groove is arranged on the outer side of the adjustable valve core and extends to the bottom thereof.

7. The monotube shock absorber with adjustable damping and nitrogen tank according to claim 6, characterized in that: A knob is installed on one side of the adjustable valve core, and the knob is located on the side of the nitrogen tank away from the valve.

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